diff options
Diffstat (limited to 'arch/x86_64/ia32/mmap32.c')
-rw-r--r-- | arch/x86_64/ia32/mmap32.c | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/arch/x86_64/ia32/mmap32.c b/arch/x86_64/ia32/mmap32.c deleted file mode 100644 index e4b84b4a417a..000000000000 --- a/arch/x86_64/ia32/mmap32.c +++ /dev/null | |||
@@ -1,79 +0,0 @@ | |||
1 | /* | ||
2 | * linux/arch/x86_64/ia32/mm/mmap.c | ||
3 | * | ||
4 | * flexible mmap layout support | ||
5 | * | ||
6 | * Based on the i386 version which was | ||
7 | * | ||
8 | * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina. | ||
9 | * All Rights Reserved. | ||
10 | * | ||
11 | * This program is free software; you can redistribute it and/or modify | ||
12 | * it under the terms of the GNU General Public License as published by | ||
13 | * the Free Software Foundation; either version 2 of the License, or | ||
14 | * (at your option) any later version. | ||
15 | * | ||
16 | * This program is distributed in the hope that it will be useful, | ||
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
19 | * GNU General Public License for more details. | ||
20 | * | ||
21 | * You should have received a copy of the GNU General Public License | ||
22 | * along with this program; if not, write to the Free Software | ||
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
24 | * | ||
25 | * | ||
26 | * Started by Ingo Molnar <mingo@elte.hu> | ||
27 | */ | ||
28 | |||
29 | #include <linux/personality.h> | ||
30 | #include <linux/mm.h> | ||
31 | #include <linux/random.h> | ||
32 | #include <linux/sched.h> | ||
33 | |||
34 | /* | ||
35 | * Top of mmap area (just below the process stack). | ||
36 | * | ||
37 | * Leave an at least ~128 MB hole. | ||
38 | */ | ||
39 | #define MIN_GAP (128*1024*1024) | ||
40 | #define MAX_GAP (TASK_SIZE/6*5) | ||
41 | |||
42 | static inline unsigned long mmap_base(struct mm_struct *mm) | ||
43 | { | ||
44 | unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur; | ||
45 | unsigned long random_factor = 0; | ||
46 | |||
47 | if (current->flags & PF_RANDOMIZE) | ||
48 | random_factor = get_random_int() % (1024*1024); | ||
49 | |||
50 | if (gap < MIN_GAP) | ||
51 | gap = MIN_GAP; | ||
52 | else if (gap > MAX_GAP) | ||
53 | gap = MAX_GAP; | ||
54 | |||
55 | return PAGE_ALIGN(TASK_SIZE - gap - random_factor); | ||
56 | } | ||
57 | |||
58 | /* | ||
59 | * This function, called very early during the creation of a new | ||
60 | * process VM image, sets up which VM layout function to use: | ||
61 | */ | ||
62 | void ia32_pick_mmap_layout(struct mm_struct *mm) | ||
63 | { | ||
64 | /* | ||
65 | * Fall back to the standard layout if the personality | ||
66 | * bit is set, or if the expected stack growth is unlimited: | ||
67 | */ | ||
68 | if (sysctl_legacy_va_layout || | ||
69 | (current->personality & ADDR_COMPAT_LAYOUT) || | ||
70 | current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY) { | ||
71 | mm->mmap_base = TASK_UNMAPPED_BASE; | ||
72 | mm->get_unmapped_area = arch_get_unmapped_area; | ||
73 | mm->unmap_area = arch_unmap_area; | ||
74 | } else { | ||
75 | mm->mmap_base = mmap_base(mm); | ||
76 | mm->get_unmapped_area = arch_get_unmapped_area_topdown; | ||
77 | mm->unmap_area = arch_unmap_area_topdown; | ||
78 | } | ||
79 | } | ||